JUGS 11 inch Sting Free Dimpled Softballs are specifically designed to be used in any pitching machine without stinging your batter's hands. These practice softballs feel just like a leather ball when hit and won't damage your aluminum bats. For maximum accuracy and performance these practice softballs are Game-Ball Yellow and the same size and weight as leather balls. JUGS Sting Free Dimpled Softballs come with a 1 year manufacturer's guarantee.